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    Dispositif d'émission/réception d'ondes radar
    1.
    发明公开
    Dispositif d'émission/réception d'ondes radar 审中-公开
    Vorrichtung zum Senden / Empfangen von Radarwellen

    公开(公告)号：EP2512028A1

    公开(公告)日：2012-10-17

    申请号：EP11306446.3

    申请日：2011-11-08

    Applicant: STMICROELECTRONICS SA

    Inventor： Moquillon, Laurence ,  Garcia, Patrice

    IPC: H03B28/00 ,  G01S13/32 ,  G01S7/35

    CPC classification number: G01S13/32 ,  G01S7/35 ,  H03B5/1215 ,  H03B5/1218 ,  H03B5/1231 ,  H03B5/1234 ,  H03B5/1243 ,  H03B2200/0008 ,  H03B2200/0066 ,  H03B2202/044 ,  H03B2202/076

    Abstract: Dispositif (1) d'émission/réception d'ondes radar, en particulier de radars à modulation de fréquence:
    ■ un circuit (2) de génération d'ondes radar, comportant un oscillateur commandé en tension (6) couplé à un circulateur (8) lui-même relié à une antenne d'émission/réception (9) ;
    ■ un circuit de détection (3) comportant un premier mélangeur (15) alimenté par ledit circulateur (8) et ledit oscillateur commandé en tension (6),
    et dans lequel l'oscillateur commandé en tension (6) comporte une entrée d'injection (56) d'un signal élaboré par un circuit complémentaire (30), ledit circuit complémentaire (30) étant alimenté en entrée par le signal de sortie (10) de l'oscillateur commandé en tension (6), et comportant un second mélangeur (36) alimenté par deux signaux (33,38) élaborés à partir du signal de sortie (10) de l'oscillateur commandé en tension (6).

    Abstract translation: 装置（1）具有包括耦合到循环器（8）的压控振荡器（6）的雷达波生成电路（2）。 检测电路（3）包括由循环器和振荡器馈送的混频器（15）。 振荡器包括用于注入由附加电路（30）产生的信号的输入端（56）。 附加电路的输入由振荡器的输出信号（10）馈送，并且包括由基于振荡器的输出信号产生的两个信号（33,38）馈送的另一个混频器（36）。

    COMPENSATED DIGITAL FREQUENCY SYNTHESIZER
    2.
    发明公开
    COMPENSATED DIGITAL FREQUENCY SYNTHESIZER 失效
    补偿，数字频率合成器

    公开(公告)号：EP0704117A1

    公开(公告)日：1996-04-03

    申请号：EP93920003.0

    申请日：1993-08-13

    Applicant: MOTOROLA, INC.

    Inventor： SHEPHERD, Wayne, P. ,  HECK, Joseph, P.

    IPC: G06F1 ,  H03C3 ,  H03L7 ,  H03B1 ,  H03B28 ,  H03C1

    CPC classification number: H03C3/09 ,  G06F1/0328 ,  H03B28/00 ,  H03B2202/076 ,  H03C1/04 ,  H03L7/02 ,  H03L7/16

    Abstract: A digital frequency synthesizer circuit with spur compensation includes a demodulator circuit (118) for demodulating the output signal (116) of the synthesizer's accumulator (108). Demodulator (118) also inverts the signal, and provides an inverted demodulated output signal (142) which is then coupled to the synthesizer clock (124) after passing through a gain stage (122) in order to modulate the synthesizer clock (124) with a compensation signal (146). The compensated clock signal (140) is then sent to accumulator (108) in order to substantially cancel out any jitter in the accumulator's output signal (116). The modulation signal (MOD IN) which is digitally applied to accumulator (108) is applied in analog fashion to the gain stage (122) in order to prevent the desired modulation signal (MOD IN) from being canceled in the output signal (116).

    Oscillating circuit device and its manufacturing method.
    3.
    发明公开
    Oscillating circuit device and its manufacturing method. 失效
    Einrichtung mit Oszillatorschaltung。

    公开(公告)号：EP0510710A1

    公开(公告)日：1992-10-28

    申请号：EP92107126.2

    申请日：1992-04-26

    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LIMITED

    Inventor： Shiga, Nobuo, c/o Yokohama Works of Sumitomo

    IPC: H03B5/18 ,  H01L27/06

    CPC classification number: H01L27/0605 ,  H03B5/1852 ,  H03B2200/0028 ,  H03B2200/0032 ,  H03B2200/0062 ,  H03B2201/0208 ,  H03B2202/025 ,  H03B2202/076

    Abstract: The oscillating apparatus according to this invention comprises a pulse doped FET (1), and a series feedback capacitor (2) connected to the source of the pulse doped FET (1), the pulse doped FET is a FET formed on a pulse doped epitaxial layer including a channel layer (23) with a high carrier density, and a cap layer (24) with a low carrier density formed on the channel layer (23). The series feedback capacitor (2) is a variable capacitor whose capacitance value increases when a gate bias voltage of the pulse doped FET (1) is changed toward increase a drain current of the pulse doped FET (1). Consequently, it is possible to reduce phase noises by controlling only the gate bias with an oscillation frequency set at a required value. As a result, the merits of the MMIC can be sufficiently utilized without the necessity of externally adding a dielectric resonator.

    Abstract translation: 根据本发明的振荡装置包括脉冲掺杂FET（1）和连接到脉冲掺杂FET（1）的源极的串联反馈电容器（2），所述脉冲掺杂FET是形成在脉冲掺杂的外延 层包括具有高载流子密度的沟道层（23）和形成在沟道层（23）上的具有低载流子密度的覆盖层（24）。 串联反馈电容器（2）是当脉冲掺杂FET（1）的栅极偏置电压改变以增加脉冲掺杂FET（1）的漏极电流时，其电容值增加的可变电容器。 因此，通过将振荡频率设定为所需值仅控制栅极偏置，可以减少相位噪声。 结果，可以充分利用MMIC的优点，而不需要外部添加介质谐振器。

    A voltage-controlled oscillator
    6.
    发明公开
    A voltage-controlled oscillator 失效
    一个压控振荡器

    公开(公告)号：EP0475262A1

    公开(公告)日：1992-03-18

    申请号：EP91114919.3

    申请日：1991-09-04

    Applicant: FUJITSU LIMITED

    Inventor： Sugawara, Hideo

    IPC: H03B5/18

    CPC classification number: H03B5/1876 ,  H03B5/1852 ,  H03B2200/0024 ,  H03B2200/004 ,  H03B2200/0062 ,  H03B2201/0208 ,  H03B2202/027 ,  H03B2202/076

    Abstract: A voltage-controlled oscillator according to the present invention comprises: a transistor (5), where the drain electrode (D) is grounded, the gate electrode (G) is connected to a resonator (3) whose resonant frequency is adjustable according to a voltage applied to a voltage-dependent capacitance diode (D₁) electromagnetically coupled with the resonator (3), an output signal is output from the source electrode (S); a resistor connected (R₂) in gate bias circuit or source voltage supply circuit for detecting a low-frequency noise component generated in the transistor (5), where the detected low-frequency noise component is amplified and fed back to the voltage-dependent capacitance (D₁) so as to cancel a phase-noise component generated in the voltage-controlled oscillator. The above-descried voltage-controlled oscillator may be further provided with a reference crystal oscillator to which the voltage-controlled oscillator is phase-locked. Thus, a microwave voltage-controlled oscillator excellent in phase-noise characteristics of the oscillated frequency is accomplished though there is employed a GaAs FET which is not good in a low-frequency noise characteristic.

    Abstract translation: 根据本发明的压控振荡器包括：晶体管（5），其中漏电极（D）接地，栅电极（G）连接到谐振器（3），谐振器（3）的谐振频率可根据 施加到与谐振器（3）电磁耦合的依赖于电压的电容二极管（D 1）的电压，输出信号从源电极（S）输出; 一个连接在栅极偏置电路或源极电压源电路中用于检测晶体管（5）中产生的低频噪声分量的电阻器（R 2），其中检测到的低频噪声分量被放大并反馈到电压相关电容 （D 1），以消除压控振荡器中产生的相位噪声分量。 上面描述的压控振荡器可以进一步设置有压控振荡器被锁相的参考晶体振荡器。 因此，虽然采用了低频噪声特性不好的GaAs FET，但实现了振荡频率的相位噪声特性优良的微波压控振荡器。

    AN APPARATUS AND METHOD FOR USING NEGATIVE FM FEEDBACK IN HIGH QUALITY OSCILLATOR DEVICES
    9.
    发明公开
    AN APPARATUS AND METHOD FOR USING NEGATIVE FM FEEDBACK IN HIGH QUALITY OSCILLATOR DEVICES 失效
    装置及方法FM OSC安排高品质采用负反馈

    公开(公告)号：EP0821846A1

    公开(公告)日：1998-02-04

    申请号：EP96913758.0

    申请日：1996-03-26

    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON

    Inventor： HAARTSEN, Jacobus

    IPC: H03B1 ,  H03L7

    CPC classification number: H03B1/04 ,  H03B2202/076 ,  H03L7/02

    Abstract: An apparatus and method are provided for increasing the effective Q-value of an oscillator so that the required Q-value can be reached with the use of a low Q-value oscillator. In this apparatus and method, the FM noise is measured at the output of the oscillator by an FM detector and the output of the FM detector is fed back to the control input of the oscillator. By using this negative FM feedback, frequency variations in the oscillator output are suppressed by applying a correction signal at the control input of the oscillator. The amount of suppression depends on the loop gain of the FM feedback loop and the amount of suppression is proportional to the loop gain so that the effective Q-value of the oscillator is proportional to the loop gain. As a result of correcting the FM noise measured at the oscillator output by using a negative FM feedback loop, the effective Q-value of the oscillator corresponds to the original Q-value multiplied by the loop gain of the FM feedback loop so that the effective Q-value of the oscillator is increased.

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